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Articles by Y. S Park
Total Records ( 3 ) for Y. S Park
  Y. S Park , J. H Park , S. H Kim , M. H Lee , Y. S Lee , S. C Yang and J. S. Kang

Limaprost, a prostaglandin E1 analogue, with a strong vasodilatory and antiplatelet activity has been used to release from the symptoms of thromboangiitis obliterans (TAO), which is more prevalent in Korea and Japan, and lumbar spinal canal stenosis (LSCS). In spite of many uses of limaprost, the pharmacokinetics (PK) of it has not been studied in the Korean population. Therefore, a preliminary PK study was designed at a clinical oral dosage of 30-µg limaprost in 5 healthy Korean volunteers. Blood samples were obtained at 14 consecutive time points for 12 hours after dosing and analyzed by liquid chromatography—tandem mass spectrometry with electrospray ionization (LC-ESI/MS/ MS) at a very low detection limit of 0.5 pg/mL of limaprost in human plasma with considerably short run time (18 minutes). Pharmacokinetic characteristics resulted in ‘‘time for maximal concentrations (Tmax 0.5 hour),’’ ‘‘elimination half-life (T1/2 1.64 hours),’’ ‘‘maximal concentration (Cmax 13.37 pg/mL),’’ ‘‘area under the curve (AUC12 hours 18.60 pg · h/mL),’’ ‘‘AUC extrapolated to infinity (AUCinfinity 22.98 pg · h/mL),’’ ‘‘extrapolation (AUCinfinity — 12 hours/AUCinfinity 0.15%),’’ ‘‘elimination rate constant (ke 0.68 h—1),’’ ‘‘systemic clearance (CL 1.77 L/h),’’ and ‘‘mean residence time (MRT 1.74 hours).’’ These results showed that orally administered 30-µg limaprost was rapidly and highly absorbed, and it was considerably eliminated fast from the blood stream in the healthy Korean volunteers.

  T. N Chung , S. W Kim , Y. S Park and I. Park

Methanol is generally known to cause visual impairment and various systemic manifestations. There are a few reported specific findings for methanol intoxication on magnetic resonance imaging (MRI) of the brain. A case is reported of unilateral blindness with third cranial nerve palsy oculus sinister (OS) after the ingestion of methanol. Unilateral damage of the retina and optic nerve were confirmed by fundoscopy, flourescein angiography, visual evoked potential and electroretinogram. The optic nerve and extraocular muscles (superior rectus, medial rectus, inferior rectus and inferior oblique muscle) were enhanced by gadolinium-DTPA on MRI of the orbit. This is the first case report of permanent monocular blindness with confirmed unilateral damage of the retina and optic nerve, combined with third cranial nerve palsy after methanol ingestion.

  S. T Kim , J. Y Park , J Lee , J. O Park , Y. S Park , H. Y Lim , W. K Kang and S. H. Park

Malignant peritoneal mesothelioma is a rare neoplasm that accounts for ~1 per 1 million has limited data regarding its frontline therapy. We investigated the treatment outcomes in patients with malignant peritoneal mesothelioma receiving frontline cisplatin-based combination chemotherapy.


We analyzed 14 patients with malignant peritoneal mesothelioma who had been treated by frontline cisplatin-based combination chemotherapy between January 2005 and March 2009. The chemotherapeutic agent added to platinum was gemcitabine in one patient, cyclophosphamide–doxorubicin in three patients and pemetrexed in 10 patients.


The confirmed overall response rate was 35.7% and the disease control rate was 71.4%. In all patients, two complete responses and three partial responses were observed (overall response rate, 35.7%). Stable disease was observed in five patients (35.7%). The median progression free survival was 4.4 months (95% CI, 0.6–9.0) and the median overall survival was 20.1 months (95% CI, 12.7–28.5). There was significant differences for progression free survival (P = 0.031) according to the different chemotherapeutic agents (pemetrexed versus non-pemetrexed agents) added to platinum. Grade 3 or 4 hematologic toxicities included leukopenia in one patient and anemia in three patients. There were no Grade 3 or 4 non-hematologic toxicities or treatment-related deaths.


The platinum-based combination chemotherapy showed moderate activity and a favorable toxicity profile as a frontline treatment for patients with malignant peritoneal mesothelioma. Pemetrexed in combination with platinum showed improved survival outcomes as compared with other combination regimens combined with platinum.

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